Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['n', '9003', 'I', 'R', '5027', '9427', 'j']

14, 9003, 9, 18, 5027, 9427, 10